[llvm] [Offload] Debug message update part 2 (PR #171683)

[Alex Duran via llvm-commits]

================
@@ -411,16 +416,15 @@ static int loadImagesOntoDevice(DeviceTy &Device) {
              "Not expecting a device ID outside the table's bounds!");
       __tgt_device_image *Img = TransTable->TargetsImages[DeviceId];
       if (!Img) {
-        REPORT("No image loaded for device id %d.\n", DeviceId);
+        REPORT() << "No image loaded for device id " << DeviceId;
----------------
adurang wrote:

```suggestion
        REPORT() << "No image loaded for device id " << DeviceId << ".";
```

https://github.com/llvm/llvm-project/pull/171683